Comments

The cause is incorrect - Pagespeed is not deprecated, just a single directive in the config. In newer versions of Pagespeed, the ModPagespeedInheritVHostConfig directive is deprecated, (it is forced to an on state), and should be therefore removed from the configuration file. To do that, locate the directive in /etc/httpd/conf.d/pagespeed.conf, and comment out the following line:

# ModPagespeedInheritVHostConfig on

(It will be configured as either on or off, but should be commented out regardless).